import java.util.Scanner;

public class Test {
    public static void fuc(int[] array,int x){
        int result = 0;
        for (int i = 0; i < array.length; i++) {
            for (int j = i + 1; j < array.length; j++) {
                if(array[i]+array[j]==x){
                    result = 1;
                    System.out.println("array["+i+"]"+"+"+"array["+j+"]"+"="+x+" 找到了下标是"+i+" "+j);
                    break;
                }
            }
        }
        if (result == 0) {
                System.out.println("没有找到");
        }
    }
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int target = sc.nextInt();
        int[] nums = {1,2,3,4,6,8,10,28,90};
        fuc(nums,target);
    }
}
